Unit Conversions
Choose your units and enter a value for an instant conversion. Each tool works independently.
Length
Result
Weight / Mass
Result
These are mass units, not force units (N, lbf or kgf). Pounds and ounces are avoirdupois mass.
Temperature
Result
Converts absolute temperatures, not temperature differences.
Pressure
Result
kgf/cm² is kilogram-force per square centimetre. Water and mercury columns use conventional density and standard gravity (9.80665 m/s²), not actual fluid temperature. Units preserve the same pressure reference; this does not convert gauge to absolute pressure. Negative values may represent gauge or differential pressure.
Density
Result
Mass per unit volume, not dimensionless specific gravity. Signed values are supported for changes; physical material density is nonnegative.
Volume
Result
Gallons are liquid volumes; US and Imperial gallons have different sizes.
Area
Result
Acre uses the international foot (43560 ft²), not the historical US survey foot.
Power
Result
HP is mechanical horsepower (550 ft·lbf/s); PS is metric horsepower (75 kgf·m/s). Btu_IT uses the International Table definition; 1 TR = 12000 Btu_IT/h.
Energy
Result
Btu_IT is the International Table Btu (1055.05585262 J). Thermochemical calorie: 1 cal = 4.184 J; 1 kcal = 1000 cal.
Results are rounded to 12 significant digits for display, with scientific notation for very small or large values. Input accepts scientific notation such as 1e-6. Values outside the supported numeric range show an error. Unit definitions and conversion factors are based on internationally recognized standards, with reference to NIST SI Conversion Tables.